She gives him a small, sheepish look before setting down her cup again. "Cylons were a line of robots used for military defense and dangerous labor. They had artificial intelligence, but no sentience... until about forty years ago. They rebelled. The war lasted less than a year until the Cylons retreated to outer space. That was the last anyone saw of them... until a little over two years ago when they returned."

Looks like there's some baggage on both sides. "Humans didn't give them biological forms, though. I don't know who's responsible for that. The Cylons never told us."